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%I #31 Aug 14 2021 21:55:09
%S 361,919,1681,1849,2419,2629,3301,5209,5539,5581,6421,7771,8551,9109,
%T 9871,10039,10609,10819,11491,13399,13729,13771,14611,15661,15961,
%U 16741,17299,18061,18229,18799,19009,19681,21589,21919,21961,22801,24151,24931,25489
%N Odd integers k such that for every m >= 1 the numbers k*4^m - 1 have at least three prime factors, not necessarily distinct, and k*4^m - 1 has at least two-element covering set.
%C Here an n-element covering set is a minimal set of n distinct primes such that at least one of these primes divides every integer in the sequence k*4^m - 1, m >= 1. - _Arkadiusz Wesolowski_, Jul 21 2021
%K nonn
%O 1,1
%A _Arkadiusz Wesolowski_, Dec 12 2013
%E Name corrected by _Arkadiusz Wesolowski_, Jul 21 2021
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